High-Performance Triethylamine Gas Sensors Based on Au-SnO2 Nanotubes Show Promising Potential for Practical Detection Applications

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Researchers at the University of Shanghai for Science and Technology have developed high-performance triethylamine (TEA) gas sensors based on Au-SnO2 nanotubes fabricated via an electrospinning method. The sensors demonstrated excellent response characteristics to 50 ppm TEA at a relatively low operating temperature of 144 degrees C, achieving a high response value (Ra/Rg) of 215.74. The incorporation of Au enabled the material to attain a narrower band gap (Eg) compared with pure SnO2, thereby enhancing electron transfer capability. The sensor displayed rapid response/recovery times (6 s/91 s), as well as good reproducibility and long-term stability.

Key Takeaways:

  • The Au-doped SnO2 nanotube sensor exhibited excellent response characteristics to 50 ppm TEA at 144 degrees C, with a high response value (Ra/Rg) of 215.74.
  • The incorporation of Au enabled the material to attain a narrower band gap (Eg) compared with pure SnO2, enhancing electron transfer capability.
  • The sensor displayed rapid response/recovery times (6 s/91 s), as well as good reproducibility and long-term stability.
  • The Au-SnO2 nanotube composites hold promising potential for practical TEA detection applications.
  • The facile preparation method suggests that these composites can be easily fabricated for practical use.
  • The research has been peer-reviewed and published in the Journal of Materials Chemistry C.

Statistics:

  • The sensor exhibited a high response value (Ra/Rg) of 215.74 to 50 ppm TEA at 144 degrees C.
  • The incorporation of Au enabled the material to attain a narrower band gap (Eg) compared with pure SnO2.
  • The sensor displayed rapid response/recovery times of 6 s/91 s.
  • The Au-SnO2 nanotube composites displayed good reproducibility and long-term stability.

Sources:

  • NewsRx. Data on Nanotubes Discussed by Researchers at University of Shanghai for Science and Technology (High-performance Triethylamine Gas Sensors Based On Sno 2 -au Nanotubes Fabricated via an Electrospinning Method). Nanotechnology Weekly. October 20, 2025; p 143.
  • Journal of Materials Chemistry C. High-performance Triethylamine Gas Sensors Based On Sno 2 -au Nanotubes Fabricated via an Electrospinning Method. 2025.